ꢀ ꢁꢂ ꢃ ꢄꢅ ꢆꢇ ꢈ ꢉꢉ ꢅꢃ
SLAS356 − DECEMBER 2001
PRINCIPLES OF OPERATION
DTMF generator operation and interface (continued)
Table 9. Typical DTMF and Single Tone Control
INTEGER
VALUE
TONE
FUNCTION
DT7
DT6
DT5
DT4
DT3
DT2
DT1
DT0
TONE/HZ
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
0
0
0
1
0
1
1
1
1
1
1
1
0
0
0
0
0
0
0
1
1
1
1
1
0
0
0
0
1
1
1
0
0
1
1
1
0
1
1
1
0
1
1
0
0
0
0
1
1
1
1
1
0
0
0
1
1
1
1
0
0
1
1
1
0
0
1
1
0
1
1
0
1
0
0
1
1
0
0
1
1
0
1
1
0
1
1
0
0
1
1
1
0
0
1
0
0
1
1
0
1
0
0
1
0
1
0
1
1
0
1
1
0
0
1
1
1
0
1
1
1
1
1
0
0
1
1
0
1
0
1
1
0
1
0
0
1
0
1
1
0
0
1
1
1
1
1
1
0
0
1
0
1
0
1
1
0
0
1
0
0
0
1
0
0
0
1
1
0
0
0
1
1
1
1
0
0
0
1
0
1
0
1
1
1
1
1
1
0
1
0
0
0
0
1
0
0
1
0
0
1
1
0
0
0
1
1
0
1
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
0
1
1
1
1
0
OFF
0
45
F
349
47
F#
370
50
G
392
53
G#
415
56
A
440
60
A#
466
63
B
494
67
C
523
71
C#
554
75
D
587
80
D#
622
84
E
659
89
F
698
95
F#
740
100
106
113
119
126
134
142
150
159
169
179
189
201
213
225
239
253
89
G
784
G#
831
A
880
A#
932
B
988
C
1047
1109
1175
1245
1319
1397
1480
1568
1661
1760
1865
1976
697
C#
D
D#
E
F
F#
G
G#
A
A#
B
DTMF Low
DTMF Low
DTMF Low
DTMF Low
DTMF HIgh
DTMF HIgh
DTMF HIgh
DTMF HIgh
99
770
109
120
155
171
189
209
852
941
1209
1336
1477
1633
26
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